Boiler



June 28, 1927 F' B. HOWELL BOILER Filed Dec. 23. 1920 4 Sheets-Sheet l JIM HW mi lI) )HMI M l IH HHH! HW June 28, 1927.

F. B. HOWELL. 1'633666 BOILEH Filed Deo. 2:5. 1920 4 sheets-sheet 5 M ,y www June F. B. HOWELL Filed Dec. 23. 1920 4 sheets-sheet 4 Il? LIHI Ima/nto@ jaa/c 6MM #ahw Patented .lune 28, 1927.

UNITED STATES PATENT OFFICE.

FRANK B. HOWELL, 0F BUFFALO, NEW YORK, ASSIGNOR TO AMERICAN RADIATOR COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY.

BOILER.

Application filed December 23, 1920. Serial No. 432,687.

My invention relates to improvements in heating apparatus, and the same has for its object more particularly to provide a boiler for heating large buildings or structures, which is simple in construction, easy to operate, and efficient in performance.

Further, said invention has for its object to provide a boiler which may be readily enlarged in order to lengthen the path of travel of the hot gases and products of cornbustion between the combustion chamber and the stack opening.

Further, said invention has for its object to provide a boiler composed of a series of transverse connected sections, arranged side by side, and in which each of said transverse sections combines with the sections of a series arranged end to end whereby the length of the boiler from front to back may be increased or decreased at will, as desired.

Further, said invention has for its object to provide a boiler comprising a plurality of transversely connected elements, certain of which constitute a fuel receptacle, and a combustion chamber, and the remaining elements form alternately ascending and descending flues leading to the stack.

Further, said invention has for its object to provide a boiler having a combustion chamber, formed independently of the fuel receptacle, in which the gases and products of combustion liberated b v the fuel are received and mixed with preheated air delivered to said combustion chamber by means of secondary air ducts.

Further, said invention has` for its object to provide novel means which are detachably arranged within the combustion chambei' for conducting secondary air thereto.

Further objects will in part be obvious, and in part be pointed out hereinafter.

To the attainment of the aforesaid objects and ends my invention consists in the novel detail-'z of construction and in the combination, connection and arrangement of parts hereinafter more fully described and then pointed out in the claims.

In the accompanying drawings:

Figure 1 is a front elevation showing one form of boiler constructed according to, and embodying my said invention Fig. 2 is a side view:

Fig. 3 is a plan or top view with the enclosing jacket partly broken away Fig. 4 is a longitudinal section on the line 4 4 of Fig. 3;

Fig. 5 is partly a longitudinal section on the line 5 -5 of Fig. 4;

Fig. 6 is a vertical section taken on the line 6-6 of Fig. 4 looking in the direction of the arrow; and

Fig. 7 is a similar view taken on the line 7 7 of Fig. 4.

In said drawings, 10 designates the boiler as a whole which is of the sectional type, and capable of enlargement transversely and longitudinally, i. e., from front to rear. The boiler consists essentially of sets of side members each composed of three hollow water sections 12, 13, 14, and four transverse intermediate members 12a, 12b, 13, 14a, each compo ed of a plurality of hollow water sections connected together and to said end or side sections 12, 13, 14, by nipples 15, 15a, 32a, 33. 46.

The end or side sections 12, 13, 14 and the intermediate sections 12a, 13a, 14a are enclosed by a metal ackct 16 provided upon its inner sides with insulating lining sections 17 of asbestos or other suitable material.

The front of the boiler is provided with an inclined upper portion 18 having fuel openings therein over which are fitted hinged doors 18, and below said inclined portion 18 the front is provided with suitable openings having doors 19, 19EL to permit of access t0 the burning fuel, and for the removal of ashes from the base of the boiler, and air supply openings controlled by butterfiy dampers 19".

The sections 12@L of the front transverse member 12 are of less height than the sections 12h so as to form the inclined opening for the fuel receptacle formed by the members 12, 12", and the end sections 12.

The front sections 12?l comprise relatively narrow water backed portions 20 from whose opposite sides extend inwardly and down- \\ardly inclined lateral tins 21,. the outer edges of which register with those of the adjoining ections and from air inlet openings or passages 22.

Adjacent to their lower ends, the front sections 12a are each provided with an inwardly and downwardly inclined member 2?; which extends about half-way across the fuel receptacle. and eo-operates with the bed of ash to support the fuel in position within said fuel receptacle. Further, said membel` 23 serves to prevent the incandescent and the green fuel dropping into the ash pit during the remo val ot' accumulated ash therefrom.

The sections 12d are provided at their front portions adjacent to their lower edges with registering eyes 24 to receive a tie rod 25 whose ends extend through the end sections 12, and certain of said sections 12a are further provided with depending feet 26 in order to support the memberl 12d constituting the transverse member 12 as a whole.

The second transverse member 12", which is substantially co-extensive in height with the height of the boiler, is composed of a plurality ot' hollow water sections 12b provided along the vertical edges of their uppermost portions with registering ribs 27 which form an unbroken wall portion 28, and below said wall portion the said sections 12b are reduced in width to form narrow portions 29 from whose opposite sides extend downward ly and forwardly-inclined lateral fins 30, the edges of which register with those of the adjoining sections and form air passages 31 for the hot gases and products of combustion liberated or produced by the burning fuel.

To the rear of said second member 12b is arranged the third transverse member 13a which is composed of a plurality of substantially rectangular sections provided at their forward lower corners with depending portions 32 to receive nipples 32a whereby said sections may be secured together at their lower ends and to their end sections 13. The upper rear corners of said sections 13a and the end sections 13 are provided with registering openings to receive nipples 33 whereby the same may be secured together.

The sections 13a are provided along their upper edges and at their forward lower edges with oppositely-extending lateral ribs 34 which serve to form a smooth unbroken wall portion 35 having a forwardly projecting portion 36 at its upper end provided with a longitudinal channel or recess 37 to receive the downward]y-extending ribs or projections 38a formed at the upper rear edges of the secondary air ducts 38.

Each air duct 38 has an enlarged upper portion 39 forming an air chamber which communicates at its opposite ends with air inlets 40" provided in the end sections 137 and controlled by rotary valves 41. The vertical edges of said air ducts 38 contact and thus form a wall whose outer surface is directly exposed to the hot gases and products of combustion passing through the combustion chamber 42 formed intermediate the transverse members 12b and 13a. The air received by and passing through said ducts is thus preheated before it issues from the open lower ends of said ducts and is mixed with the products of combustion passing through said combustion chamber.

Each air duct section 38 is provided upon its upper side with a pair of upwardly extending lugs 43 having openings therein to receive a hook or other implement when it is desired to remove or replace said duct sections.

The front portions of the sections 13a above said air ducts 38 are not provided with contacting ribs at their opposite edges in order to leave flue spaces 44 through which the products of combustion may enter, and after passing downwardly between said sections be deflected by the ribs 45 which extend downwardly and forwardly from the upper rear corners of said sections and termiuate near the lower central parts of said sections 13".

To the rear of said third members 13a is arranged a transverse rear member which is composed of a plurality of sections 14al of substantially the same form as the elements 13a of the preceding member. The front edges of the sections 14n substantially contact with the rear edges of the sections 13at in front thereof.

The sections 14a are provided at their upper rear corners and their lower forward corners with nipples 46 whereby said sections may be secured together and to their respective end sections 14.

The upper edges of the sections 132t and 14a and the corresponding end sections 13, 14, are provided along their upper edges with registering ribs 47, and the rear edges of the sections 14EL and the end sections 14 are provided with ribs 48. The sections 14 and 14 are also provided upon their opposing sides with ribs 49 which extend from the lower forward corners of said sections 14a. 14 rearwardly and upwardly paralleling the general direction of the ribs 45, and form flue parts 40a. The said flue parts 40a form a continuation of the tlues 40 formed by the members 13, 13a. The flues 40. 4()a extend downwardly and communicate with the space provided at the rear of the projection 50 at the lower rearward end of the sections 14a, which space constitutes a collecting flue 51 connecting said tlues 40, 40'rl with the smoke outlet 52 provided at the lower rear side of the boiler.

The contacting ribs 47 at the upper edges of the sections 13a, 14a are cut away to form openings 53 to permit of the introduction of a tool to clean the fines. These openings are norn'ially closed by removable covers 54.I which in turn are concealed by covers 55 provided in the top of the jacket.

The operation of the boiler will be obvious from the foregoing description.

Having thus described my said invention what I claim and desire to secure by Letters Patent is:-

1. A boiler of the character described comprising front, rear and intermediate seloo llt)

ries of connected sections forming a fuel receptacle and a combustion chamber, and a series of connected sections constituting the back of the boiler; said series of sections disposed to the rear of the series constituting the front of said combustion chamber fornr ing a series of flues extending from said combustion chamber to the smoke outlet of the boiler` substantially as speeitied.

2. A boiler of the character described comprising front, rear and intermediate series of connected sections forming a fuel receptacle and a combustion chamber, and a series of connected sections constituting the back of the boiler; said series of sections disposed to the rear of the series constituting the front of said combustion chamber forming a series of lues extending from said combustion chamber' to the smoke outlet of the boiler, each of said iues comprising a plurality of parts, certain of which are arranged in one of said series of said sections and the remainder of said parts arranged in other of said series of sections, substan tially as specified.

3. A boiler of the character described comprising front, rear and intermediate series of connected sections forming a vertical fuel receptacle and a vertical combustion chamber to the rear of said fuel receptacle, a series of connected sections constituting` the back of the boiler, a` plurality of flue parts in said back sections, and a pluralit).v of flue parts in the series of sections interposed between the series of sections constituting the front of said combustion chamber and a series of sections constituting the back of the boiler; said last named flue parts cooperating with the flue parts in said back sections to form a series of sinuous fines extending from said combustion chamber to the smoke outlet of the boiler, substantiall)7 as specified.

4. A boiler of the character described comprising front. rear and intermediate Series of connected sections forming a fuel receptacle and a combustion chamber, a series of connected vertical sections constituting? the back of the boiler, and a plurality of laterally-extending registering ribs upon the opposite sides of the sections of said series disposed to the rear of the series constituting the front of said combustion chamber.` forming a series of tlues intermediate the same extending from said combustion chamber to the smoke outlet of the boiler, substantially as specified.

5. A boiler of the character described comprising front` rear and intermediate ,series of connected sections forl'ning a fuei receptacle and a combustion chamber, a series of connected sections constituting the back of the boiler and forming fines communicating with the smoke outlet of the boiler; the sections interposed between the series of sections constituting the front of said combustion chamber and the series of sections constituting the back of the boiler forming lines between said combustion chamber and the series of sections constituting the back of the boiler, and means arranged in said combustion chamber for conducting secondary air to the base thereof, substantially as specifi-ed.

6, A boiler of the character described comprisingfront, rear and intermediate scries of connected sections, forming a fuel receptacle and a combustion chamber. a series of connected sections constituting the back of the boiler and forming fines communicating with the smoke outlet of the boiler; the sections interposed between the series of sections constituting the front of said combustion chamber and the series of sections constituting the back of the boiler forming lines between said combustion chamber and the series of sections constituting the back of the boiler, and a plurality of members arranged end to end in said combustion chamber and forming a continuous duct for conducting secondary air to the base of said combustion chamber.

7. A boiler of the character described comprising front, r-ear and intermediate series of. connected sections forming a fuel receptacle and a combustion chamber, a series of connected sections constituting the back of the boiler and forming flues communicating with the smoke outlet of the boiler; the sections interposed between the series of sections constituting the front of said combustion chamber and the series of sections constituting the back of the boiler forniing lues between said combustion chamber and the series of sections constitilting the back of the boiler, and a pluralityv of members arranged end to end in said combustion chamber comprising a longitudinal chamber provided at its ends with air inlets and relatively narrow portions extending therefrom; said members jointly forming a continuous duct for conducting secondary air to the base ot said combustion chamber.

8. A boiler of the character described comprising front, rear and intermediate series of connected sections forming a fuel receptacle and a combustion chamber, a series of connected back sections, registering ribs on said back sections extending rearwardly and upwardly from the lower front corners there-of forming flue members communicating with a smoke outlet, and registering 'ribs on a said series of connected sections interposed between said fuel receptacle and said back sections; the registering ribs on said interposed sections extending downwardly and inwardly from the upper rear corners thereof, and forming flue members cooperating with the flue members 0f said back sections to form continuous passages extending from said fuel receptacle to said smoke outlet, substantially as specified.

9. A boiler of the character described comprising end sections, and a plurality of transverse members each composed of a seriesof connected sections, certain of said members jointly constituting a fuel receptacle having inlet and outlet openings, and one of said members in conjunction with other of the remaining members forming a combustion chamber communicating with said fuel receptacle, and having flues therein communicating with said combustion chamber, and a further member constituting the back of the boiler having an inlet and an outlet and forming fines connecting said first-named lues with said last-named outlet, substantially as specified.

10. A boiler of the character described comprising end sections, and a plurality of transverse members each composed of a se ries of connected sections, certain of said members jointly constituting a fuel recep tacle having inlet and outlet openings and one of said members in conjunction with other of the remaining members forming a combustion chamber communicating adj acent to its base with said fuel receptacle, and having flues therein whose inlet ends communicate with the upper portion of said combustion chamber, and a further member constituting the back of the boiler having a smoke outlet and flues; the inlet ends of said fines communicating with the outlet ends of the fines first-'named and forming therewith a series of passages extending from said combustion chamber to said smoke outlet, substantially as specified.

11. A boiler of the character described comprising end sections, and a plurality of transverse members each composed of a series of connected sections, certain of said sections jointly constituting a fuel receptacle having inlet and outlet openings, and one of said members in conjunction with other of the remaining members forming a eombus`- tion chamber communicating adjacent to its base with said fuel receptacle, and having fines therein Whose inlet ends communicate with the upper portion of said combustion chamber, a secondary air duct arranged in said combustion chamber intermediate the outlet openings of said combustion chamber, and the inlet of the flues formed in the member forming part of said combustion chamber for conducting preheated air to the base of said combustion chamber,l and a further member constituting the back of the boiler having a smoke outlet and flues; the inlet ends of said flues communicating with the outlet ends of the fines i'rstmamed, and forming therewith a series of passages eX- tending from said combustion chamber to said smoke outlet, substantially as specified.

12. A boiler of the character described comprising a series of end sections and a plurality of transverse members each composed of a plurality 0f connected sections; two of said members constituting a fuel receptacle having inlet and outlet passages therein, an intermediate member having lucs therein; one side of said intermediate member jointly with one of the members constituting said fuel receptacle forming a combustion chamber communicating With Said fuel receptacle, and a further member constituting the back of the boiler having a smoke outlet therein and flues; the flues of said further member, in conjunction with the fiues of said intermediate member, forming a series of sinuous flues between said combustion chamber and said smoke outlet, substantially as specified.

13. A boiler of the character described comprising a serios of end sections and a plurality of transverse members constituting a fuel receptacle having inlet and outlet passages therein, an intermec iate member having fiues therein; one side of said intermediate member jointly with one of the members constituting said fuel receptacle forming a combustion chamber communicating with said fuel receptacle; the front wall of said intermediate member comprisin;` an unbroken lower portion and an aperlured upper portion communicating with the flucs therein, a longitudinal projection on said front Wall, between said unbroken and said apertured portions,y having a recess therein,` an air duct having an enlarged upper portion and a relatively narrow outlet porti in extending therefrom, means at the upper end of said duct adapted to engage the recess in said longitudinal projection to support duct, and a further member constitue' Y the back of the boiler having` a smoke outlet therein and flues, the flues of sai-fil further member in conjunction with the flucs of said intermediate member forming a series of sinuous flues between said combustion chainbcr and said smoke outlet, substantially as specified.

14. A boiler of the character described comprising a series of end sections and a plu rality of transverse members constituting a fuel receptacle having inlet and outlet passages therein, an intermediate member having flues therein; one side of said intermediate member jointly with one of the niembers constituting said fuel receptacle forming a combustion chamber connnuncating with said fuel receptacle; the front wall of said intermediate member comprisingr an unbroken lower portion and an aicrlured upper portion communicatingv with the flues therein, a longitudinal projection on said front wall, between said unbroken and said apertured portions, having a rccess therein, an air duct having an enlarged upper porlOl) tion and a relatively narrow outlet portion extending therefrom, lugs at the upper ends of said duct adapted to engage the recess in said longitudinal projection to support said duct, and a further member constituting the back of the boiler having a smoke outlet therein and lues; the flues of said further member in conjunction with the flues of said intermediate member forming a series of sinuous fines between said combustion chamber and said smoke outlet, .substantially as specied.

15. A boiler of the character described comprising a series of end sections and a plurality of transverse members constituting a fuel receptacle having inlet and outlet passages therein7 an intermediate member having flues therein; one side of said intermediate member jointly with one of the members constituting said fuel receptacle forming a combustion chamber communicating with said fuel receptacle; the front wall of said intermediate member comprising an unbroken lower portion and an apertured upper portion communicating with the lues therein, a longitudinal projection on said front wall, between said unbroken and said apertured portions, having a recess therein, an air duct composed of a plurality of vertical sections arranged end to end and forming an enlarged upper portion communicating with a source of air supply, and relatively narrow outlet portions extending from said enlarged upper portions, and hook members at the upper ends of said duct sections adapted to engage with the recess in said longitudinal projection to support said duct sections; and a further member constituting the back of the boiler having a smoke outlet therein and flues; the lues of said further member, in conjunction with the iues of said intermediate member, forming a series of sinuous lues between said combustion chamber and said smoke outlet, substantially as specified.

Signed at the city of Buffalo, Erie County, in the State of New York, this 23d day of November, one thousand nine hundred and twenty.

FRANK B. HOWELL. 

